ML20125B988
| ML20125B988 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 12/27/1979 |
| From: | Pilant J NEBRASKA PUBLIC POWER DISTRICT |
| To: | Gammill W Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20125B991 | List: |
| References | |
| TAC-13148, NUDOCS 8001020484 | |
| Download: ML20125B988 (2) | |
Text
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A GENERAL OFFICE Nebraska Public Power District
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December 27, 1979 Office of Nuclear Reactor Regulation Attn: William Cammill, Acting Assistant Director Division of Operating Reactors, Projects U.S. Nuclear Regulatory Commission Washington, DC 20555
Subject:
Station Electrical Distribution System Vol:. age Cooper Nuclear Station NRC Docket No. 50-298, DPR-46
Reference:
- 1) Letter from W. Gammill to All Power Reactor Licensees Dated August 8, 1979, " Adequacy of Station Electric Distribution Systems Voltages"
- 2) Letter from J. Pilant to W. Gammill Dated October 8, 1979, same subject
Dear Mr. Gammill:
Reference 1 requested Nebraska Public Power District to submit a voltage drop analysis for Cooper Nuclear Station, and Reference 2 informed the NRC of the expected submittal date. Attached is the completed " Voltage Drop Analysis Computations" conducted in accordance with the NRC guide-lines contained in Reference 1.
The analysis indicates the following:
1.
The offsite power system and the onsite distribution system for Cooper Nuclear Station is of sufficient capacity and capability to automatically start as well as operate all required safety loads within their voltage ratings in the event of:
2.
The electrical power systems for Cooper Nuclear Station do not have any potential for any events or conditions which could result in the simultaneous or consequential loss of both required circuits to the offsite network in violation of GDC-17 in this regard.
The NRC requested that testing be performed to provide additional verifi-cation of the adequacy of the station electrical distribution system.
Testing methods are presently being studied in light of the favorable analytical results. A description of the method used to perform this 7y verification will be provided approximately May 30, 1980.
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William Gammill December 27-'1979 1
Page 2 If you have any questions relative to the enclosed analysis, please do not hesitate to contact me.
Very truly yours, il Director of Licensing and Quality Assurance JDW/cmk Attachment 90000283 O